There is a new pull request by pbui against master on the void-packages repository

https://github.com/pbui/void-packages dhcpcd
https://github.com/void-linux/void-packages/pull/15858

[RFC] dhcpcd: fix high cpu usage
As reported on IRC, some users are experiencing high CPU usage when
using eduroam and/or suspending/resuming their machines.  This update
includes a few upstream changes that should possibly address this
situation:

1. Runs the STOPPED hook on interfaces when a timeout occurs.

2. Includes an upstreamed musl patch.

3. Validates RTM_DELADDR/RTM_NEWADDR messages for both IPv6 and IPv4.

I believe the last change most directly addresses the high CPU usage
situation.

A patch file from https://github.com/void-linux/void-packages/pull/15858.patch is attached